Volvo RWD 200 Forum

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why is my rpm dropping 200 1986

hello,
when i let off the accelerator at low speeds, the rpm drops and the car is close to dying, and it dies sometimes. it picks up quickly to normal idle though.

i checked the vacuum at several places and the car still has this rpm dip close to 0 rpm's.

the fpr is pretty new. the external fuel pump is essentially new with <10k miles.

i believe i replaced the internal fuel pump a few more miles back.

any experience with this?

thanks again,
byron golden
86 245
92 245
94 940








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why is my rpm dropping 200 1986

Check your air cleaner also - on our '90 744 TI, the foam in the top of the box went to powder and clogged up the air cleaner.








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why is my rpm dropping 200 1986

When was the last time you cleaned the throttle body, IAC valve, and flame trap system?
Dan








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why is my rpm dropping 200 1986

hello dan,
ah yes. flame trap done 22 dec 2014.

but in my notebook, i don't see the tb and iac cleaned in the past 6 years.

yep, let me get those two done first after it stops raining here.

sorry to cry wolf; i should know better.


thanks,
byron







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